Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 309, NWS Nashville, TN
NWS Nashville, TN issued this severe thunderstorm warning at Sep 8, 2009, 12:56 PM CDT for Cheatham County, Montgomery County, Robertson County, Tennessee. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 8, 2009, 12:56 PM CDT (17:56 UTC)
- Expired
- Sep 8, 2009, 1:30 PM CDT
- In force
- 34 min
- Issued by
- NWS Nashville, TN
- Area
- Storm-based polygon
Counties Cheatham County, TN, Montgomery County, TN, Robertson County, TN
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 5.9 hours before the alert went out and 57 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1139 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 871 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 8, 3:18 AM CDT, 9 hours 38 minutes earlier.
Area forecast discussion, Sep 8, 3:18 AM CDT, 9 hours 38 minutes before
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</html>Hazardous weather outlook, Sep 8, 3:25 AM CDT, 9 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NASHVILLE TN 325 AM CDT TUE SEP 8 2009 TNZ009>011-028>034-062>066-075-077>080-090830- MACON-CLAY-PICKETT-WILSON-TROUSDALE-SMITH-JACKSON-PUTNAM-OVERTON- FENTRESS-RUTHERFORD-CANNON-DEKALB-WHITE-CUMBERLAND-BEDFORD-COFFEE- WARREN-GRUNDY-VAN BUREN- 321 AM CDT TUE SEP 8 2009 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT THE FOLLOWING WEATHER HAZARD(S) ARE IN EFFECT... DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING FOR LOCATIONS EAST OF INTERSTATE 65...INCLUDING THE CUMBERLAND PLATEAU REGION. THE FOG IS EXPECTED TO LAST INTO THE MORNING RUSH HOUR...THEN DISSIPATE BY 9 AM. VISIBILITY WILL BE NEAR ZERO IN SOME AREAS...ESPECIALLY AROUND LAKES AND RIVERS. A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WWW.SRH.NOAA.GOV/OHX OR BY LISTENING TO NOAA WEATHER RADIO. MAINLY AFTERNOON ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP TODAY. WITH ALL THUNDERSTORMS...EXPECT DANGEROUS CLOUD TO GROUND LIGHTNING. SOME OF THESE THUNDERSTORMS COULD PRODUCE STRONG WINDS... HAIL...AND LOCALLY VERY HEAVY RAINFALL. PATCHY FOG DEVELOPMENT IS AGAIN EXPECTED AFTER MIDNIGHT TONIGHT ACROSS THE ENTIRE MID STATE. MOTORIST SHOULD EXERCISE CAUTION WHILE DRIVING ON AREA ROADWAYS AFTER MIDNIGHT TONIGHT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... DUE TO THE BRIEF AND ISOLATED NATURE OF POSSIBLE SEVERE WEATHER... SPOTTER ACTIVATION IS NOT ANTICIPATED. TNZ005>008-022>027-056>061-093>095-090830- STEWART-MONTGOMERY-ROBERTSON-SUMNER-BENTON-HOUSTON-HUMPHREYS- DICKSON-CHEATHAM-DAVIDSON-PERRY-HICKMAN-LEWIS-WILLIAMSON-MAURY- MARSHALL-WAYNE-LAWRENCE-GILES- 321 AM CDT TUE SEP 8 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT MAINLY AFTERNOON ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP TODAY. WITH ALL THUNDERSTORMS...EXPECT DANGEROUS CLOUD TO GROUND LIGHTNING. SOME OF THESE THUNDERSTORMS COULD PRODUCE STRONG WINDS... HAIL...AND LOCALLY VERY HEAVY RAINFALL. PATCHY FOG DEVELOPMENT IS AGAIN EXPECTED AFTER MIDNIGHT TONIGHT ACROSS THE ENTIRE MID STATE. MOTORIST SHOULD EXERCISE CAUTION WHILE DRIVING ON AREA ROADWAYS AFTER MIDNIGHT TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... DUE TO THE BRIEF AND ISOLATED NATURE OF POSSIBLE SEVERE WEATHER... SPOTTER ACTIVATION IS NOT ANTICIPATED. 31/JBW
The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 10:15 PM CDT | Dense Fog Advisory | OHX | Bedford, Cannon, Clay, Coffee, Cumberland, DeKalb and 14 more | 11 hr |
| Sep 7, 10:16 PM CDT | Areal Flood Advisory | OHX | Giles | 3 hr |
| Sep 7, 10:49 PM CDT | Areal Flood Advisory | OHX | Giles, Lawrence | 3 hr |
| Sep 8, 1:02 PM CDT | Severe Thunderstorm Warning | OHX | Montgomery | 28 min |
| Sep 8, 1:46 PM CDT | Severe Thunderstorm Warning | OHX | Robertson, Sumner | 29 min |
| Sep 8, 2:33 PM CDT | Severe Thunderstorm Warning | OHX | Bedford | 11 min |
| Sep 8, 2:50 PM CDT | Severe Thunderstorm Warning | OHX | Giles | 10 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2009Every severe thunderstorm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.